/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.flink.streaming.api.constraint.identifier;

public class AutoGeneratedConstraintGroupIdentifier extends ConstraintGroupIdentifier {
	private static int count = 0;

	private int id;

	public AutoGeneratedConstraintGroupIdentifier() {
		id = count++;
	}

	@Override
	public boolean equals(Object o) {
		if (this == o) {
			return true;
		}
		if (!(o instanceof AutoGeneratedConstraintGroupIdentifier)) {
			return false;
		}

		AutoGeneratedConstraintGroupIdentifier that = (AutoGeneratedConstraintGroupIdentifier) o;

		return id == that.id;
	}

	@Override
	public int hashCode() {
		return id;
	}

	@Override
	public String toString() {
		return "AutoGeneratedConstraintIdentifier{" +
				"id=" + id +
				'}';
	}
}
